CN115195239A - 一种柔性碳纤维复合材料及制备方法 - Google Patents
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- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims abstract description 88
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- SHLNMHIRQGRGOL-UHFFFAOYSA-N barium zinc Chemical compound [Zn].[Ba] SHLNMHIRQGRGOL-UHFFFAOYSA-N 0.000 description 3
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- B29B15/00—Pretreatment of the material to be shaped, not covered by groups B29B7/00 - B29B13/00
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- B29B15/10—Coating or impregnating independently of the moulding or shaping step
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B29C70/28—Shaping operations therefor
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Abstract
本发明公开了一种柔性碳纤维复合材料及其制备方法,属于复合材料技术领域,本发明提供的柔性碳纤维复合材料的制备方法,利用钛酸酯偶联剂对碳纤维网布进行改性,改性后可提高与PVC的剥离强度,再将改性碳纤维网布烫平、上糊分别与PVC透明面层和PVC底膜进行贴合,得到一种剥离强度高、稳定性好,外观呈现碳纤维网布的立体纹路效果的柔性碳纤维复合材料,且工艺简单,易于推广及工业化生产。
Description
技术领域
本发明属于复合材料技术领域,具体涉及一种柔性碳纤维复合材料及制备方法。
背景技术
碳纤维是一种含碳量在95%以上的纤维材料,其具备高强度和高模量,内柔外刚,具有质量轻、耐腐蚀等特性。碳纤维不仅具有碳材料的固有性质,还兼备纺织纤维的柔软可加工性,可用作绝热保温材料,或者作为增强材料加入树脂、金属、陶瓷、混凝土等材料中,构成复合材料。
申请公布号为CN104908390 A的中国发明专利公开了在碳纤维布层的两侧贴合PVC膜层,得到一种PVC碳纤维复合布,该材料具有防水、防火、耐摩擦等性能。但碳纤维与PVC之间难以贴合,该材料易分层,剥离强度较低,稳定性差,难以实现应用。
发明内容
为了克服上述现有技术的缺陷,本发明所要解决的技术问题是:如何得到一种剥离强度高、稳定性好的柔性碳纤维复合材料。
为了解决上述技术问题,本发明采用的技术方案为:一种柔性碳纤维复合材料的制备方法,包括以下步骤:
步骤1、碳纤维网布改性处理:先将钛酸酯偶联剂用溶剂稀释成改性剂溶液,再将碳纤网布浸入改性剂溶液浸渍,再干燥,得到改性碳纤维网布;
步骤2、先将改性碳纤网布烫平,烫平后依次进行第一次双面上糊、第一次烘干、第二次双面上糊和第二次烘干,得到上糊碳纤维网布;
步骤3、PVC透明面层和PVC底膜经过加热处理后,分别贴合在预热后的上糊碳纤维网布的两侧,得到柔性碳纤维复合材料。
本发明的有益效果在于:本发明提供的柔性碳纤维复合材料的制备方法,利用钛酸酯偶联剂对碳纤维网布进行改性,碳纤复合材料断裂伸长率在3~5%,伸长率很低,尺寸稳定性好,改性后可提高与PVC的剥离强度,再将改性碳纤维网布烫平、上糊分别与PVC透明面层和PVC底膜进行贴合,得到一种剥离强度高、稳定性好,外观呈现碳纤维网布的立体纹路效果的柔性碳纤维复合材料,且工艺简单,易于推广及工业化生产。
具体实施方式
为详细说明本发明的技术内容、所实现目的及效果,以下结合实施方式予以说明。
本发明最关键的构思在于:利用钛酸酯偶联剂对碳纤维网布先进行改性,改性后可提高与PVC的剥离强度。
本发明提供一种柔性碳纤维复合材料的制备方法,包括以下步骤:
步骤1、碳纤维网布改性处理:先将钛酸酯偶联剂用溶剂稀释成改性剂溶液,再将碳纤网布浸入改性剂溶液浸渍,再干燥,得到改性碳纤维网布;
步骤2、先将改性碳纤网布烫平,烫平后依次进行第一次双面上糊、第一次烘干、第二次双面上糊和第二次烘干,得到上糊碳纤维网布;
步骤3、PVC透明面层和PVC底膜经过加热处理后,分别贴合在预热后的上糊碳纤维网布的两侧,得到柔性碳纤维复合材料。
从上述描述可知,本发明的有益效果在于:利用钛酸酯偶联剂对碳纤维网布进行改性,碳纤复合材料断裂伸长率在3-5%,伸长率很低,尺寸稳定性好,改性后可提高与PVC的剥离强度,再将改性碳纤维网布烫平、上糊分别与PVC透明面层和PVC底膜进行贴合,得到一种剥离强度高、稳定性好,外观呈现碳纤维网布的立体纹路效果的柔性碳纤维复合材料,且工艺简单,易于推广及工业化生产。
进一步地,溶剂为纯度95%的乙醇溶液;改性剂溶液中钛酸酯偶联剂的质量浓度为5~10%。
从上述描述可知,钛酸酯偶联剂的浓度偏低会造成改性效果变差,影响剥离强度。
进一步地,浸渍时间为1~3min,干燥温度为120~140℃。
从上述描述可知,干燥温度偏高,使干燥后的改性碳纤维带有余温,可直接进行下一步;浸渍时间长影响加工效率,浸渍时间太短影响偶联剂与纤维表面的接枝反应,改性效果减弱。。
进一步地,第一次双面上糊时,糊剂的粘度为600~1000cps,单面上糊量为40~70gsm;第二次双面上糊时,糊剂的粘度为3000~5000cps,单面上糊量为150~200gsm。优选地,糊剂的粘度为800~900cps;第二次双面上糊时,糊剂的粘度为3500~4500cps
从上述描述可知,第一次上糊的作用为固纱,第二次上糊可增加材料韧性。第一次上糊,粘剂粘度低,上糊量少,糊剂渗透基布网孔或部份缝隙,主要起网布定型作用,减少变形。第二次上糊量大,粘度高一些,主要是提高基布与薄膜的剥离强度;糊树脂柔软,回弹性好,相比脆性的碳纤性,上糊会增加材料韧性。
进一步地,第一次烘干的温度为110~130℃;第二次烘干的温度为140~170℃。优选地,第一次烘干的温度为120~130℃;第二次烘干的温度为150~160℃
从上述描述可知,烘干至糊剂不粘辊。
进一步地,加热处理的温度为170~190℃,预热的温度为150~170℃。优选地,加热处理的温度为175~180℃,预热的温度为155~165℃
从上述描述可知,加热处理和预热之后,可增加改性碳纤维和PVC膜的结合效果,增强剥离强度。
进一步地,烫平的温度为80~110℃。
从上述描述可知,烫平后可去除水份。
实施例1:
一种柔性碳纤维复合材料的制备方法,包括以下步骤:
步骤1、碳纤维网布改性处理:先将钛酸酯偶联剂用纯度95%的乙醇稀释成质量浓度为10%的改性剂溶液,再将碳纤网布浸入改性剂溶液浸渍3min,再在140℃下干燥,得到改性碳纤维网布;
步骤2、先将改性碳纤网布在80℃下烫平,烫平后依次进行第一次双面上糊、第一次烘干、第二次双面上糊和第二次烘干,得到上糊碳纤维网布;第一次双面上糊时,糊剂的粘度为1000cps;第二次双面上糊时,糊剂的粘度为5000cps;第一次烘干的温度为130℃;第二次烘干的温度为170℃;
第一次浸渍上糊,第二次刀刮上糊;贴合压力25kg/cm2;糊剂由以下重量份的组分组成:100份E-PVC;65份DOP;2份液体钡锌稳定剂;4份PVC交联剂;
步骤3、PVC透明面层和PVC底膜经过190℃加热处理后,分别贴合在170℃的温度预热后的上糊碳纤维网布的两侧,得到柔性碳纤维复合材料。
实施例2:
一种柔性碳纤维复合材料的制备方法,包括以下步骤:
步骤1、碳纤维网布改性处理:先将钛酸酯偶联剂用纯度95%的乙醇稀释成质量浓度为5%的改性剂溶液,再将碳纤网布浸入改性剂溶液浸渍1min,再在120℃下干燥,得到改性碳纤维网布;
步骤2、先将改性碳纤网布在110℃下烫平,烫平后依次进行第一次双面上糊、第一次烘干、第二次双面上糊和第二次烘干,得到上糊碳纤维网布;第一次双面上糊时,糊剂的粘度为600cps;第二次双面上糊时,糊剂的粘度为3000cps;第一次烘干的温度为110℃;第二次烘干的温度为140℃;
第一次浸渍上糊,第二次刀刮上糊;贴合压力25kg/cm2;糊剂由以下重量份的组分组成:100份E-PVC;85份DINP;3份液体钡锌稳定剂;8份PVC交联剂;
步骤3、PVC透明面层和PVC底膜经过170℃加热处理后,分别贴合在150℃的温度预热后的上糊碳纤维网布的两侧,得到柔性碳纤维复合材料。
实施例3:
一种柔性碳纤维复合材料的制备方法,包括以下步骤:
步骤1、碳纤维网布改性处理:先将钛酸酯偶联剂用纯度95%的乙醇稀释成质量浓度为8%的改性剂溶液,再将碳纤网布浸入改性剂溶液浸渍2min,再在130℃下干燥,得到改性碳纤维网布;
步骤2、先将改性碳纤网布在100℃下烫平,烫平后依次进行第一次双面上糊、第一次烘干、第二次双面上糊和第二次烘干,得到上糊碳纤维网布;第一次双面上糊时,糊剂的粘度为800cps;第二次双面上糊时,糊剂的粘度为4000cps;第一次烘干的温度为120℃;第二次烘干的温度为160℃;
第一次浸渍上糊,第二次刀刮上糊;贴合压力30kg/cm2;糊剂由以下重量份的组分组成:100份E-PVC;80份DOP;2份液体钡锌稳定剂;6份PVC交联剂;
步骤3、PVC透明面层和PVC底膜经过180℃加热处理后,分别贴合在160℃的温度预热后的上糊碳纤维网布的两侧,得到柔性碳纤维复合材料。
对比例1:
对比例1与实施例1的区别在于,未对改性碳纤网布进行改性。
测试实施例1~3和对比例1的柔性碳纤维复合材料的剥离强度和断裂伸长率,测试结果见表1。
表1
项目 | 实施例1 | 实施例2 | 实施例3 | 对比例1 |
剥离强度 | 151N/5cm | 149N/5cm | 154N/5cm | 92N/5cm |
断裂伸长率 | 4.7% | 3.4% | 3.9% | 6.2% |
由表1数据可知,实施例1~3的剥离强度均大于对比例1,剥离强度在150N左右,伸长率均小于对比例1,在3-5%之间。本发明提供的柔性碳纤维复合材料的制备方法,利用钛酸酯偶联剂对碳纤维网布进行改性,伸长率很低,尺寸稳定性好,改性后可提高与PVC的剥离强度,再将改性碳纤维网布烫平、上糊分别与PVC透明面层和PVC底膜进行贴合,得到一种剥离强度高、稳定性好,外观呈现碳纤维网布的立体纹路效果的柔性碳纤维复合材料,且工艺简单,易于推广及工业化生产。
以上所述仅为本发明的实施例,并非因此限制本发明的专利范围,凡是利用本发明说明书内容所作的等同变换,或直接或间接运用在相关的技术领域,均同理包括在本发明的专利保护范围内。
Claims (7)
1.一种柔性碳纤维复合材料的制备方法,其特征在于,包括以下步骤:
步骤1、碳纤维网布改性处理:先将钛酸酯偶联剂用溶剂稀释成改性剂溶液,再将碳纤网布浸入改性剂溶液浸渍,再干燥,得到改性碳纤维网布;
步骤2、先将改性碳纤网布烫平,烫平后依次进行第一次双面上糊、第一次烘干、第二次双面上糊和第二次烘干,得到上糊碳纤维网布;
步骤3、PVC透明面层和PVC底膜经过加热处理后,分别贴合在预热后的上糊碳纤维网布的两侧,得到柔性碳纤维复合材料。
2.根据权利要求1所述的柔性碳纤维复合材料的制备方法,其特征在于,所述溶剂为纯度95%的乙醇溶液;改性剂溶液中钛酸酯偶联剂的质量浓度为5~10%。
3.根据权利要求1所述的柔性碳纤维复合材料的制备方法,其特征在于,所述浸渍时间为1~3min,所述干燥温度为120~140℃。
4.根据权利要求1所述的柔性碳纤维复合材料的制备方法,其特征在于,所述第一次双面上糊时,糊剂的粘度为600~1000cps,单面上糊量为40~70gsm;所述第二次双面上糊时,糊剂的粘度为3000~5000cps,单面上糊量为150~200gsm。
5.根据权利要求1所述的柔性碳纤维复合材料的制备方法,其特征在于,所述第一次烘干的温度为110~130℃;所述第二次烘干的温度为140~170℃。
6.根据权利要求1所述的柔性碳纤维复合材料的制备方法,其特征在于,所述加热处理的温度为170~190℃,所述预热的温度为150~170℃。
7.一种根据权利要求1-6任意一项所述的柔性碳纤维复合材料的制备方法制备得到的柔性碳纤维复合材料。
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